   <!-- Bootstrap 的 CSS 文件 -->
    <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.6.0/css/bootstrap.min.css" rel="stylesheet">
    <!-- font awesome图标 -->
    <link href="//netdna.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
	<style>
		a:hover{
			text-decoration: none;
		}
		.table thead th{
			border: none;
		}
		.table th a{
			display: inline-block;
			width: 80px;
		}
	</style>                        
